JP7266661B1 - Mixed material pumping device in concrete or mortar spraying system - Google Patents

Mixed material pumping device in concrete or mortar spraying system Download PDF

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JP7266661B1
JP7266661B1 JP2021189913A JP2021189913A JP7266661B1 JP 7266661 B1 JP7266661 B1 JP 7266661B1 JP 2021189913 A JP2021189913 A JP 2021189913A JP 2021189913 A JP2021189913 A JP 2021189913A JP 7266661 B1 JP7266661 B1 JP 7266661B1
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mixed material
concrete
mortar
pumping device
pumping
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JP2023076892A (en
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招平 吉永
正洋 佐藤
恵男 和田
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SANWA INDUSTRY CO., LTD.
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract

【課題】含有水分が多い骨材の使用により吹付作業効率が低下してしまう。【解決手段】ミキシングタンク６の吐出口に装着し、エアコンプレッサー12及び混合材料圧送路14を接続して、ミキシングタンク６から吐出された混合材料を圧縮空気により混合材料圧送路14側へ送り出す横長Ｌ字形の接続管９における少なくとも折曲部位に、当該部位の内面を高温化可能なヒーター部15を設けることによって、含有水分が多い骨材を含む混合材料が上記内面に付着せずに弾かれて、接続管９内の混合材料による狭窄・閉塞を防止可能とする。【選択図】図１[PROBLEMS] To reduce the efficiency of spraying work by using aggregate with a high water content. A horizontally elongated device is attached to a discharge port of a mixing tank 6, connects an air compressor 12 and a mixed material pumping path 14, and sends the mixed material discharged from the mixing tank 6 to the mixed material pumping path 14 side with compressed air. By providing a heater section 15 capable of increasing the temperature of the inner surface of the bent portion of the L-shaped connecting pipe 9 at least, the mixed material containing aggregate containing a large amount of moisture is repelled without adhering to the inner surface. This makes it possible to prevent narrowing and blockage due to the mixed material in the connecting pipe 9 . [Selection drawing] Fig. 1

Description

本発明は、骨材及びセメント材（粉状セメント材又は造粒セメント材）の混合材料と水を別々に吹付ノズル側に送り該吹付ノズル側で混合した後に吐出させるコンクリート又はモルタルの吹付システムにおいて、混合材料を吹付ノズル側へ圧送する混合材料圧送装置に関する。 The present invention relates to a concrete or mortar spraying system in which a mixed material of aggregate and cement (powder cement or granulated cement) and water are separately fed to the spray nozzle side, mixed on the spray nozzle side, and then discharged. and a mixed material pumping device for pumping a mixed material to a spray nozzle side.

従来、かかるコンクリート又はモルタルの吹付システムにあっては、骨材及びセメント材を含む混合材料の圧送装置と、水の圧送装置と、前記混合材料圧送装置と前記水圧送装置とを接続して、前記混合材料を破砕・撹拌させ前記水を加える機能を有する接続装置と、該接続装置に接続され、合流後の前記混合材料と前記水とが互いに混ざり合いながら通過するコンクリート又はモルタルの圧送ホースと、該圧送ホースに接続され、モルタル又はコンクリートを吐出させる吹付ノズルとを備えたものが見受けられる（例えば、特許文献１参照）。 Conventionally, in such a concrete or mortar spraying system, a mixed material pressure-feeding device containing aggregate and cement, a water pressure-feeding device, the mixed material pressure-feeding device and the water pressure-feeding device are connected, A connecting device having a function of crushing and agitating the mixed material and adding the water, and a concrete or mortar pressure-feeding hose connected to the connecting device and through which the mixed material and the water after confluence pass while being mixed with each other. , and a spray nozzle for discharging mortar or concrete connected to the pressure-feeding hose (see, for example, Patent Document 1).

このコンクリート又はモルタル吹付システムは、粉状セメントと骨材の混合材料を乾式圧送する場合、粉状セメントの配合比が高くなると、粉状セメントが骨材と容易に分離し、骨材に付着した水分と反応し固化等して圧送することが出来なくなることが頻繁に発生したことから開発されており、造粒セメント材の粒径を、従来の粉状セメントよりも大きくすることで、骨材と分離し難くなり均一に混合した状態で圧送することが出来る様になっている。 In this concrete or mortar spraying system, when a mixed material of powdered cement and aggregate is dry-pumped, when the blending ratio of powdered cement becomes high, the powdered cement is easily separated from the aggregate and adheres to the aggregate. It was developed because it frequently occurred that it could not be pumped due to solidification due to reaction with water. It is difficult to separate from the granules and can be pumped in a uniformly mixed state.

特開２０１９－１５７５６４号公報JP 2019-157564 A

しかし、現状では、シルト成分が多く付着・含有されていることで含有水分が多い安価な骨材（特に細骨材）を使用するケースが顕著で、この様な骨材を上記従来技術に使用すると、混合材料圧送装置におけるミキシングタンクの吐出口への接続管が直角に曲がっていることから、混合材料が骨材の含有水分により接続管内面の屈曲部位にくっついてしまうため、圧送時の抵抗が大きくなり、而も不規則な脈動が発生し易くなって、最終的に閉塞してしまって、吹付作業効率が著しく低下するなど、解決せねばならない課題があった。 However, at present, there are many cases in which inexpensive aggregates (especially fine aggregates) with a large amount of water content are used because they contain a large amount of silt components. Then, since the connection pipe to the discharge port of the mixing tank in the mixed material pumping device is bent at right angles, the mixed material sticks to the bent part of the inner surface of the connecting pipe due to the moisture contained in the aggregate, so the resistance during pumping is reduced. In addition, irregular pulsation is likely to occur, eventually resulting in clogging, resulting in a significant drop in spraying work efficiency.

本発明は、上記従来技術に基づく、含有水分が多い骨材の使用により吹付作業効率が低下してしまう課題に鑑み、骨材及びセメント材を含む混合材料を乾式圧送する混合材料圧送装置と、水の圧送装置と、前記混合材料圧送装置と前記水圧送装置とを接続して、前記混合材料を破砕・撹拌させて前記水を加える機能を有する接続装置と、該接続装置に接続され、合流後の前記混合材料と前記水とが互いに混ざり合いながら通過するコンクリート又はモルタルの圧送ホースと、該コンクリート又はモルタル圧送ホースに接続されモルタル又はコンクリートを吐出させる吹付ノズルとを備えるモルタル又はコンクリート吹付システムにおいて、混合材料圧送装置におけるミキシングタンクの吐出口に装着し、エアコンプレッサー及び混合材料圧送路を接続して、ミキシングタンクから吐出された混合材料を圧縮空気により混合材料圧送路側へ送り出す横長Ｌ字形の接続管における少なくとも屈曲部位に、当該部位の内面を高温化可能なヒーター部を設けたことによって、混合材料が骨材の含有水分により接続管の内面の屈曲部位に付着しない、即ちライデンフロスト現象（ある液体を、その沸点に比べてはるかに高温に熱せられた固体表面に滴らせた時、液体が瞬時に蒸発せずに固体表面上で浮いている様に見える現象）と思われる現象により弾かれる様にして、上記課題を解決する。 In view of the problem that the use of aggregate with a high moisture content reduces the efficiency of spraying work based on the above-described conventional technology, the present invention provides a mixed material pumping device for dry pumping a mixed material containing aggregate and cement, A connection device having a function of connecting a water pressure-feeding device, the mixed material pressure-feeding device and the water pressure-feeding device, crushing and stirring the mixed material and adding the water, and a connection device connected to the connection device to join A mortar or concrete spraying system comprising a concrete or mortar pressure-feeding hose through which the mixed material and the water pass while being mixed with each other, and a spray nozzle connected to the concrete or mortar pressure-feeding hose for discharging the mortar or concrete. A horizontal L-shaped connection that is attached to the discharge port of the mixing tank in the mixed material pumping device, connects the air compressor and the mixed material pumping path, and sends the mixed material discharged from the mixing tank to the mixed material pumping path side by compressed air . By providing a heater part capable of heating the inner surface of at least the bent portion of the pipe to a high temperature, the mixed material does not adhere to the bent portion of the inner surface of the connecting pipe due to the moisture contained in the aggregate, that is, the Leidenfrost phenomenon (some When a liquid is dripped onto the surface of a solid heated to a much higher temperature than its boiling point, the liquid does not evaporate instantly and appears to float on the surface of the solid. In order to solve the above problems.

要するに本発明は、骨材及びセメント材を含む混合材料を乾式圧送する混合材料圧送装置と、水の圧送装置と、前記混合材料圧送装置と前記水圧送装置とを接続して、前記混合材料を破砕・撹拌させて前記水を加える機能を有する接続装置と、該接続装置に接続され、合流後の前記混合材料と前記水とが互いに混ざり合いながら通過するコンクリート又はモルタルの圧送ホースと、該コンクリート又はモルタル圧送ホースに接続されモルタル又はコンクリートを吐出させる吹付ノズルとを備えるモルタル又はコンクリート吹付システムにおいて、モルタル又はコンクリート吹付システムにおける混合材料圧送装置を、前記混合材料のミキシングタンクと、該ミキシングタンクへの前記混合材料の投入装置と、前記ミキシングタンクの吐出口に装着する横長Ｌ字形の接続管と、該接続管における圧縮空気導入口にエアホースを介して接続するエアコンプレッサーと、前記接続管における前記混合材料の吐出端に基端側を、前記接続装置に先端側を接続する前記混合材料の圧送路とを有し、前記接続管における少なくとも屈曲部位に、当該部位の内面を高温化可能なヒーター部を設けたので、ライデンフロスト現象と思われる現象により接続管の内面に衝突した混合材料が弾かれて、接続管の内面にくっつかないため、接続管内の混合材料による狭窄、延いては閉塞を防止することが出来る等その実用的効果甚だ大である。 In short, the present invention connects a mixed material pumping device for dry pumping a mixed material containing aggregate and cement, a water pumping device, and the mixed material pumping device and the water pumping device to pump the mixed material. A connection device having a function of adding the water by crushing and stirring; a concrete or mortar pressure-feeding hose connected to the connection device and through which the mixed material and the water after joining pass while being mixed with each other; and the concrete. Alternatively, in a mortar or concrete spraying system comprising a spray nozzle connected to a mortar pressure feeding hose and discharging mortar or concrete, the mixed material pressure feeding device in the mortar or concrete spraying system is a mixing tank for the mixed material and a supply to the mixing tank. A device for charging the mixed material, a horizontally long L-shaped connecting pipe attached to the discharge port of the mixing tank, an air compressor connected to the compressed air inlet of the connecting pipe via an air hose, and the mixing in the connecting pipe. A pumping path for the mixed material that connects the base end to the discharge end of the material and the tip end to the connection device, and a heater part that can heat the inner surface of the part at least at the bent portion of the connection pipe. is provided, the mixed material that collides with the inner surface of the connecting pipe is repelled by a phenomenon that seems to be the Leidenfrost phenomenon, and does not stick to the inner surface of the connecting pipe, preventing constriction and even clogging due to the mixed material in the connecting pipe. The practical effect is extremely large, such as being able to

本発明に係る混合材料圧送装置を使用したモルタル又はコンクリート吹付システムの概略図である。1 is a schematic diagram of a mortar or concrete spraying system using a mixed material pumping device according to the present invention; FIG. 本発明に係る混合材料圧送装置の正面図である。1 is a front view of a mixed material pumping device according to the present invention; FIG. 冷却手段を講じた混合材料圧送装置の要部拡大正面図である。FIG. 2 is an enlarged front view of a main part of a mixed material pumping device provided with cooling means;

骨材及びセメント材の混合材料と水を別々に吹付ノズル側に送り該吹付ノズル側で混合した後に吐出させるコンクリート又はモルタルの吹付システムにあっては、図１に示す様に、骨材及びセメント材材を含む混合材料を乾式圧送する混合材料圧送装置１と、水の圧送装置２と、混合材料圧送装置１と水圧送装置２とを接続して、混合材料を破砕・撹拌させ水を加える機能を有する接続装置３と、該接続装置３に接続され、合流後の混合材料と水とが互いに混ざり合いながら通過するコンクリート又はモルタルの圧送ホース４と、該圧送ホース４に接続され、モルタル又はコンクリートを吐出させる吹付ノズル５とを備えている。
In a concrete or mortar spraying system in which a mixed material of aggregate and cement and water are separately fed to the spray nozzle side and mixed at the spray nozzle side before being discharged, as shown in FIG. A mixed material pumping device 1 for dry pumping a mixed material containing materials, a water pumping device 2, and a mixed material pumping device 1 and a water pumping device 2 are connected to crush and stir the mixed material and add water. a connecting device 3 having a function; a concrete or mortar pressure-feeding hose 4 connected to the connecting device 3 and through which the combined material and water are mixed while being mixed with each other; A spray nozzle 5 for discharging concrete is provided.

図２は、本発明に係る混合材料圧送装置の正面図であり、この混合材料圧送装置１は、セメント材材と骨材を撹拌・混合し均一化するミキシングタンク６と、該ミキシングタンク６への混合材料の投入装置であるスクリュコンベア７と、ミキシングタンク６の吐出口に装着する横長Ｌ字形の接続管９と、該接続管９における圧縮空気導入口10にエアホース11を介して接続するエアコンプレッサー12と、接続管９における混合材料の吐出端に基端側を、接続装置３に先端側を接続する混合材料の圧送路14とで構成され、接続管９の屈曲部位に、当該部位の内面を高温化可能なヒーター部15を設けている。 FIG. 2 is a front view of a mixed material pressure-feeding device according to the present invention. This mixed material pressure-feeding device 1 includes a mixing tank 6 for stirring, mixing and homogenizing the cement material and aggregate, and A screw conveyor 7 which is a device for charging mixed materials, a horizontally long L-shaped connecting pipe 9 attached to the discharge port of the mixing tank 6, and an air hose 11 connected to a compressed air inlet 10 in the connecting pipe 9 It is composed of a compressor 12 and a mixed material pumping path 14 that connects the proximal side to the discharge end of the mixed material in the connecting pipe 9 and the distal side to the connecting device 3. A heater section 15 capable of increasing the temperature of the inner surface is provided.

接続管９は、ミキシングタンク６の吐出口に接続する縦管部位16及び混合材料圧送路14を接続する横管部位17とを有すると共に、屈曲部位における横管部位17の反対側に圧縮空気導入口10を形成している。 The connection pipe 9 has a vertical pipe portion 16 connected to the discharge port of the mixing tank 6 and a horizontal pipe portion 17 connected to the mixed material pumping path 14, and the compressed air is introduced to the opposite side of the horizontal pipe portion 17 at the bent portion. forming the mouth 10.

横管部位17の先端にヒーター管20を着脱自在に装着し、該ヒーター管20の外周部に補助ヒーター部18を設けたり、スクリュコンベア７のケーシングの外周部に補助ヒーター部18設けている。 A heater tube 20 is detachably attached to the tip of the horizontal tube portion 17 , and an auxiliary heater section 18 is provided on the outer circumference of the heater tube 20 , or an auxiliary heater section 18 is provided on the outer circumference of the casing of the screw conveyor 7 .

混合材料圧送路14は、接続管９に接続されたフレキシブルメタルホース21と、接続装置３に接続された耐圧ホース22とを有しており、フレキシブルメタルホース21に冷却手段23を講じ、該冷却手段23は、図３に示す様に、冷却水を張った水槽としているが、要するにフレキシブルメタルホース21内の高温状態の混合材料を適正温度に低下させる機能を有するものであれば何でも良い。 The mixed material pumping path 14 has a flexible metal hose 21 connected to the connection pipe 9 and a pressure-resistant hose 22 connected to the connection device 3. A cooling means 23 is provided for the flexible metal hose 21, and the cooling As shown in FIG. 3, the means 23 is a water tank filled with cooling water, but in short, any means can be used as long as it has the function of lowering the temperature of the mixed material in the flexible metal hose 21 at a high temperature to an appropriate temperature.

ヒーター部15や補助ヒーター部18は、例えばジャケットヒーターの様な、接続管９やスクリュコンベア７のケーシングの外周部に巻き付けて設置する、断熱機能を有することで作業者が接触しても安全なものが望ましいが、要するにヒーター部15は接続管９の内面温度を高温化したり、補助ヒーター部18は接続管９内やスクリュコンベア７内を高温状態とすることが可能なものであれば何でも良く、特にヒーター部15は接続管９の内面温度をを５００～７００度程度に加熱可能なものが好ましく、接続管９の全体を覆うように設置しても良い。 The heater part 15 and the auxiliary heater part 18 are, for example, jacket heaters, which are installed by winding them around the connecting pipe 9 and the casing of the screw conveyor 7, and have a heat insulation function, so that they are safe even if an operator comes into contact with them. However, in short, anything is acceptable as long as the heater section 15 can raise the temperature of the inner surface of the connecting pipe 9 and the auxiliary heater section 18 can make the inside of the connecting pipe 9 and the inside of the screw conveyor 7 hot. In particular, the heater part 15 is preferably one capable of heating the inner surface temperature of the connecting pipe 9 to about 500 to 700°C, and may be installed so as to cover the connecting pipe 9 as a whole.

エアホース11は、圧縮空気導入口10に接続された圧力調整弁24に接続されており、該圧力調整弁24により、吹付作業員が吹付ノズル５を保持可能な範囲で可能な限り大きい圧力に調整可能としている。 The air hose 11 is connected to a pressure regulating valve 24 connected to the compressed air inlet 10, and the pressure regulating valve 24 adjusts the pressure to the maximum possible pressure within the range where the spraying operator can hold the spray nozzle 5. It is possible.

又、補助ヒーター部18は混合材料を加熱し含有水分を少しでも除去することを期待して設置するもので、図面上、スクリュコンベア７と接続管９の両方に設置されているが、どちらか一方に設置したり、両方に設置しなくても良い。 Further, the auxiliary heater section 18 is installed with the expectation that it will heat the mixed material and remove even a small amount of contained moisture. It does not have to be installed on one side or both.

又、接続管９の出入口に温度センサーを設け、測定値に基づきヒーター部15を調節可能とすることで、ヒーター部15を最適条件下で稼働させることを可能としても良い。 Also, a temperature sensor may be provided at the inlet/outlet of the connection pipe 9 so that the heater section 15 can be adjusted based on the measured value, so that the heater section 15 can be operated under optimum conditions.

１ 混合材料圧送装置
２ 水圧送装置
３ 接続装置
４ コンクリート又はモルタル圧送ホース
５ 吹付ノズル
６ ミキシングタンク
９ 接続管
10 圧縮空気導入口
11 エアホース
12 エアコンプレッサー
14 混合材料圧送路
15 ヒーター部 REFERENCE SIGNS LIST 1 mixed material pumping device 2 water pumping device 3 connecting device 4 concrete or mortar pumping hose 5 spraying nozzle 6 mixing tank 9 connecting pipe
10 Compressed air inlet
11 air hose
12 air compressor
14 Mixed material pumping path
15 Heater

Claims (1)

骨材及びセメント材を含む混合材料を乾式圧送する混合材料圧送装置と、水の圧送装置と、前記混合材料圧送装置と前記水圧送装置とを接続して、前記混合材料を破砕・撹拌させて前記水を加える機能を有する接続装置と、該接続装置に接続され、合流後の前記混合材料と前記水とが互いに混ざり合いながら通過するコンクリート又はモルタルの圧送ホースと、該コンクリート又はモルタル圧送ホースに接続されモルタル又はコンクリートを吐出させる吹付ノズルとを備えるモルタル又はコンクリート吹付システムにおいて、
前記混合材料圧送装置は、前記混合材料のミキシングタンクと、該ミキシングタンクへの前記混合材料の投入装置と、前記ミキシングタンクの吐出口に装着する横長Ｌ字形の接続管と、該接続管における圧縮空気導入口にエアホースを介して接続するエアコンプレッサーと、前記接続管における前記混合材料の吐出端に基端側を、前記接続装置に先端側を接続する前記混合材料の圧送路とを有し、前記接続管における少なくとも屈曲部位に、当該部位の内面を高温化可能なヒーター部を設けたことを特徴とするコンクリート又はモルタル吹付システムにおける混合材料圧送装置。 A mixed material pumping device for dry pumping a mixed material containing aggregate and cement, a water pumping device, and the mixed material pumping device and the water pumping device are connected to crush and agitate the mixed material. a connection device having the function of adding water, a concrete or mortar pressure-feeding hose connected to the connection device and through which the combined material and the water pass while being mixed with each other, and the concrete or mortar pressure-feeding hose. A mortar or concrete spraying system comprising a connected spray nozzle for discharging mortar or concrete,
The mixed material pumping device includes a mixing tank for the mixed material, a device for charging the mixed material into the mixing tank, a horizontally long L-shaped connection pipe attached to the discharge port of the mixing tank, and a compression device in the connection pipe. An air compressor connected to an air inlet via an air hose, and a pumping path for the mixed material connecting the proximal side to the discharge end of the mixed material in the connecting pipe and the distal side to the connection device, A mixed material pumping device in a concrete or mortar spraying system, characterized in that a heater part capable of increasing the temperature of the inner surface of at least the bent portion of the connection pipe is provided.
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JP2000104258A (en) 1998-07-27 2000-04-11 Toko Corp Slope face spray method
JP2007327329A (en) 2002-12-02 2007-12-20 Nisshoku Corp Mortar or concrete spraying apparatus
JP2007516871A (en) 2004-01-06 2007-06-28 シーカ・テクノロジー・アーゲー Method for treating spouted concrete with a spray device and spray device
JP2007222759A (en) 2006-02-22 2007-09-06 Nippon Oil Corp Spray apparatus of sulfur material
JP2008019556A (en) 2006-07-10 2008-01-31 Nippon Oil Corp Method of constructing concrete surface layer
JP2013517164A (en) 2010-01-21 2013-05-16 コンストラクション リサーチ アンド テクノロジー ゲーエムベーハー Concrete spraying with heat recovery
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JP2021173070A (en) 2020-04-27 2021-11-01 株式会社ヒノデ開発 Mortar or concrete spraying method and spraying device

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